朱乃龙, 张世雄. 岩石深凹边坡稳定性坡角的初步确定方法[J]. 工程力学, 2003, 20(5): 130-133.
引用本文: 朱乃龙, 张世雄. 岩石深凹边坡稳定性坡角的初步确定方法[J]. 工程力学, 2003, 20(5): 130-133.
ZHU Nai-long, ZHANG Shi-xiong. A BASIC WAY TO DETERMINE THE STABLE SLOPE ANGLE FOR FURROW PITS[J]. Engineering Mechanics, 2003, 20(5): 130-133.
Citation: ZHU Nai-long, ZHANG Shi-xiong. A BASIC WAY TO DETERMINE THE STABLE SLOPE ANGLE FOR FURROW PITS[J]. Engineering Mechanics, 2003, 20(5): 130-133.

岩石深凹边坡稳定性坡角的初步确定方法

A BASIC WAY TO DETERMINE THE STABLE SLOPE ANGLE FOR FURROW PITS

  • 摘要: 在假设岩体为各向同性的弹性体,只承受自重应力作用,并对其进行截头喇叭曲面开挖情况下,以喇叭曲面形边坡上环岩体为力学模型,分析其临界下滑时的应力状态,并以库仑准则作为环岩体的破坏准则,推导出了深凹边坡的稳定性坡角α与岩体的内摩擦角φ,内粘聚力C,容重γ,及边坡的水平半径r之间的联系关系式。该式表明了深凹边坡的稳定性坡角可随着开挖深度增加而增大的空间力学原理,它为采用减少深凹露天矿底部废石剥离量的凸曲线形边坡奠定了理论基础,也为确定其边坡的合理形状提供了初步方法。

     

    Abstract: This paper is concerned with the stress state of the trumpet slope of furrow pits during excavation. The rock mass is assumed to be homogeneous and elastic, and loaded only by its dead weight. With the coulomb's criterion, the relationship of the stable slope angle, the angle of internal friction, the cohesion, the specific weight and the horizontal radius of furrow pit is derived in the paper. It is shown that the more deeply the furrow pit is excavated, the greater the stable slope angle is. The present work provides the theoretical basis of reducing stripping in furrow pits and the determination of the configuration of stable slope.

     

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